[cfe-commits] r162259 - /cfe/trunk/lib/CodeGen/CodeGenModule.cpp

[Kostya Serebryany]

Author: kcc
Date: Tue Aug 21 01:53:28 2012
New Revision: 162259

URL: http://llvm.org/viewvc/llvm-project?rev=162259&view=rev
Log:
[asan] If we are compiling with ASan, add metadata indicating dynamically initialized globals. Patch by Reid Watson, reviewed by Richard Smith

Modified:
    cfe/trunk/lib/CodeGen/CodeGenModule.cpp

Modified: cfe/trunk/lib/CodeGen/CodeGenModule.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenModule.cpp?rev=162259&r1=162258&r2=162259&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CodeGenModule.cpp (original)
+++ cfe/trunk/lib/CodeGen/CodeGenModule.cpp Tue Aug 21 01:53:28 2012
@@ -1682,6 +1682,18 @@
   if (NeedsGlobalCtor || NeedsGlobalDtor)
     EmitCXXGlobalVarDeclInitFunc(D, GV, NeedsGlobalCtor);
 
+  // If we are compiling with ASan, add metadata indicating dynamically
+  // initialized globals.
+  if (LangOpts.AddressSanitizer && NeedsGlobalCtor) {
+    llvm::Module &M = getModule();
+
+    llvm::NamedMDNode *DynamicInitializers =
+        M.getOrInsertNamedMetadata("llvm.asan.dynamically_initialized_globals");
+    llvm::Value *GlobalToAdd[] = { GV };
+    llvm::MDNode *ThisGlobal = llvm::MDNode::get(VMContext, GlobalToAdd);
+    DynamicInitializers->addOperand(ThisGlobal);
+  }
+
   // Emit global variable debug information.
   if (CGDebugInfo *DI = getModuleDebugInfo())
     if (getCodeGenOpts().DebugInfo >= CodeGenOptions::LimitedDebugInfo)